Device for dressing and jointing saws



(No Model.) 2 Sheets-Sheet l J. H. LEITH. DEVICE FOR DRESSING AND'JOINTING SAWS. N0. 144;446: Patented Jan. 13, 1891.

2 Sheets-Sheet 2. TH.

ND JOINTING SAWS.

(No Model.)

J. H. LE DEVICE FOR DRESSING A Patented Jan. 13,1891,

i=nmw UNITED STATES PATENT OFFICE.

JOSEPH ll. LEITH, OF SANDPATCII, PENNSYLVANIA.

DEVICE FOR DRESSING AND JOINTING SAWS.

SPECIFICATION forming part of Letters Patent No. 444,446, dated January13,- 1891.

Application filed August 20, 1890. Serial No. 362,503. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH H. LEITH, a citizen of the United States,residing at Sandpatch, in the countyof Somerset and State ofPennsylvania, have invented a new and 'useful Device for Side Dressingand Jointing the Teeth of Circular Saws, of which the following is aspecification.

This invention relates to devices for jointing and tube side dressingcircular saws; and it has for its object to construct an apparatus ofthis class which shall be simple and easily operated,and by means ofwhich the teeth of circular saws of various sizes may betrimmed withperfect accuracy.

With these ends in view the invention consists in the improvedconstruction, arrangement, and combination of parts, to be hereinafterfully described, and particularly pointed out in the claim.

Referring to the drawings hereto annexed, Figure 1 is a side viewshowing my improved saw jointer and gager mounted upon the mandrel orarbor of a circular saw in position for operation. Fig. 2 is an edgeview of the same. Fig. 3 is a sectional detail view taken on the line 33 in Fig. 1.

Like numerals of reference indicate like parts in all the figures.

1 designates a clamp or collar, which is divided, as shown in Fig. 1,and provided with a set-screw 2, by means of which it may be looselymounted upon a saw-arbor or upon a collar rigidly secured to the latter.The collar 1 is provided with an outwardly-extending arm 23, terminatingin a tubular portion 4, having a set-screw 5, by means of which anextension-arm 6 may be secured in the said tubular section. The outerend of the extension-arm 6, which latter is preferably made of roundiron, is screw-threaded, as shown at 7, and is screwed into aninverted-U-shaped clamp S, which is adapted to straddle the saw 9, andthe arms of which are provided with set-screws 10, which may be made tobear lightly against opposite sides of the saw, for the purpose ofsteadying and guiding the device in operation. The outer end of the U-shaped clamp 8 is provided with a suitablyshaped recess 1l,in which areseated the files 12 and 13, which are held in place in said recess bymeans of a set-screw 14, which latter may be tightened to bring thefiles up against the points of the saw-teeth. The files 12 are beveled,as shown, or placed in oppositely-inclined positions, so as to engageopposite sides of the points of the saw-teeth and impart to the latterthe desired shape.

The operation of my invention and its advantages will be readilyunderstood from the foregoing description, taken in connection with thedrawings hereto annexed, by those skilled in the art to which itappertains. The construction of the device is simple and inexpensive,and it may be quickly mounted for operation upon the arbor of a circularsaw of any dimensions, the extension-rod 6 being adjustable radially tothe axis of such arbor. The proper adjustment having been made, and thefiles having been tightened up against the points of the saw-teeth bymeans of the set-screw 14, the saw is subjected to the action of thefiles.

By this device circular saws may be sharpened very quickly andeffectively, and the teeth will all be left of precisely the same size,thus enabling the saw to perform its work more neatly and effectivelyand without danger of any of the saw-teeth being broken owing to anexcess of length.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

In a device of the class described, the U- shaped clamp mounted upon asuitable ex tension-rod extending from a ring or collar and having thesocket provided with oppositely-beveled sides,the files 12 and13,n1ounted in said socket, and the set-screw 14, adapted to force thesaid files against the points of the saw-teeth, substantially as setforth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

JOSEPH II. LEITH.

\Vitnesses:

JOHN DANAH, ISRAEL SHELBRY.

